Superb Asahi Opt. Co. Super Takumar 300mm, f/4 Telephoto LensMade in Japan
Serial No. 3602410
It has the 42mm screw thread mount making it suitable for numeroud camera brands, including the earlier Pentax models.
A & M settings
Aperture clean, dry and 'snappy'
Integral retractable hood.
Optics clear and bright
Original end caps, The front lens cap is metal.
Beautiful 'used' lens.